java - 从另一个xml布局添加ListView时发生NullPointerException

feedLayout = new LinearLayout(this);
feedLayout.setOrientation(LinearLayout.VERTICAL);
//LayoutInflater inflater = (LayoutInflater)  getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = getLayoutInflater().inflate(R.layout.list_feeds, feedLayout, false);
lstFeeds = (ListView) v.findViewById(R.id.listfeeds);
lstFeeds.setAdapter(new FeedsAdapter(this, android.R.layout.simple_list_item_1, lista));
feedLayout.addView(lstFeeds);

Logcat：

IllegalStateException:
The specified child already has a parent you must call removeChild() ...

最佳答案

您需要使用

feedLayout.removeAllViews();

之前

feedLayout.addView(v);

编辑：

feedLayout = new LinearLayout(this);
feedLayout.setOrientation(LinearLayout.VERTICAL);
//LayoutInflater inflater = (LayoutInflater)  getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = getLayoutInflater().inflate(R.layout.list_feeds, feedLayout, false);
lstFeeds = (ListView) v.findViewById(R.id.listfeeds);
lstFeeds.setAdapter(new FeedsAdapter(this, android.R.layout.simple_list_item_1, lista));
feedLayout.addView(v);